To Remove Hood And Grill Assembly; To Adjust Throttle Control Cable; To Adjust Choke Control; To Adjust Carburetor - Craftsman EZ3 917.270840 Owner's Manual

20.5 hp electric start 42" mower automatic lawn tractor
Table of Contents

Advertisement

TO REMOVE
HOOD AND GRILL AS-
SEMBLY
• Raise hood.
Unsnap headlight wire connector.
Stand =nfront of tractor. Grasp hood at
sides, tilt toward engine and lift off of
tractor.
• To replace, reverse above procedures.
Hood
\
.
Headlight
", '
Wire
Connector
Quarter Circle
Choke Closed
;wivel
Casing Clamp
Screw
ENGINE
Maintenance,
repair, or replacement of the
emission control devices and systems,
which are being done at the customers
expense, may be performed by any non-
road engine repair establishment
or indi-
vidual.
Warranty repairs must be per-
formed by an authorized engine manufac-
turer's service outlet.
TO ADJUST
THROTTLE
CONTROL
CABLE
The throttle control has been preset at the
factory and adjustment should not be nec-
essary.
Check adjustment as described
below before loosening cable.
If adjust-
ment is necessary, proceed as follows:
• With engine not running, move throttle
control lever to fast position.
• Check that swivel is against side of
quarter circle. If it is not, loosen cable
clamp screw and pull cable back until
swivel is against quarter circle. Tighten
cable clamp screw securely.
TO ADJUST
CHOKE
CONTROL
The choke control has been preset at the
factory and adjustment should not be nec-
essary.
Check adjustment as described
below before loosening cable.
If adjust-
ment is necessary, proceed as follows:
• With engine not running, move choke
control (located on dash panel) to full
choke position.
• Remove air cleaner cover, filter and car-
tridge plate to expose carburetor choke
(see "AIR FILTER" in the Customer
Responsibilities
section of this manual).
• Choke should
be closed.
If it is not,
loosen casing'clamp
screw and move
choke cable until choke is completely
closed. Tighten casing clamp screw se-
curely.
• Reassemble
air cleaner.
Choke Lever
TO ADJUST
CARBURETOR
The carburetor has been preset at the fac-
tory and adjustment
should not be neces-
sary. However, minor adjustment
may be
required to compensate
for differences in
fuel, temperature,
altitude or load.
If the
carburetor does need adjustment, proceed
as follows:
In general, turning the mixture screw In
(clockwise) decreases the supply of fuel to
the engine giving a leaner fuel/air mixture.
Turning the mixture screw out (counter-
clockwise) increases
the supply of fuel to
the engine giving a richer fuel/air mixture.
IMPORTANT:
Damage to the needles and
the seats in carburetor may result if screw
is turned in too tight.
PRELIMINARY
SETTING
• Be sure you have a clean air fitter, and
the throttle control cable and choke are
adjusted
properly
(see above).
• With engine off turn id}e mixture
screw
in (clockwise) closing it finger tight and
then turn out (counterclockwise)
1-1/4
to 1-1/2 turns.
FINAL SE'I-rlNG
• Start engine and allow to warm for five
minutes.
Make final adjustments
with
engine running and shift/motion
control
lever in neutral (N) position.
• With throttle control lever in slow posi-
tion, hold throttle
lever against idle
speed screw and adjust idle speed
screw to obtain 1200 to 1400 RPM.
28

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents